# Apps On Physics

From Script | Spoken-Tutorial

Apps on physics simulations are for teaching and learning basic physics.

Apps on Physics can be downloaded from **https://www.walter-fendt.de/html5/phen/**

Contributors, Content Editors, and Reviewers

The Spoken Tutorial Effort for Apps on Physics is being contributed by Ms. Himanshi Karwanje and Ms. Madhuri Ganapathi from IIT Bombay.

**Learners** - Secondary and higher secondary students, and teachers.

## Contents

## Basic Level

**1. Simple Machines**

- Define a Pulley

- Demonstrate the working of a pulley system

- Calculate the necessary force to pull the load

- Demonstrate the working of a lever

- Define a torque

- Demonstrate how to achieve a balance condition

**2. Inclined Plane**

- Define an inclined plane

- Uses of an inclined plane

- Explanation of Inclined Plane App interface

- Demonstrate the motion of the load on an inclined plane

- About force vectors

- Change in the angle of inclination from 0 degrees to 90 degrees

- About inclination angle

- Resolution of parallel and perpendicular vectors

- Calculate the resolution of gravity forces

- Observe the effect of friction on an inclined plane

** 3. Linear Motion **

- Demonstrate the motion of a car with a constant acceleration

- State Newton's first law of motion

- Explain the following graphs
- Position v/s time
- Velocity v/s time
- Acceleration v/s time

- Calculate the position and velocity using equation of motion

- Demonstrate the setup of an air track glider

- State Newton's second law of motion

- Verify Newton's second law of motion

**4. Forces **

- About the App interface

- Demonstrate addition of vectors

- Explain triangle law of vectors

- Change the magnitude of vectors and show the formation of resultant vector

- Explain polygon law of vectors

- Define equilibrium of forces

- Show a simple experiment to achieve an equilibrium condition

- Show changes in the angles as force changes

**5. Kepler’s laws **

- Explanation of Kepler's Laws App interfaces

- Define Kepler’s first law

- Demonstrate Kepler's first law

- Define Aphelion and Perihelion distances

- Calculate Aphelion and Perihelion distances

- About Halley’s comet

- Define orbital period

- Define Kepler’s second law

- Demonstrate Kepler's second law

- Show the direction of velocity vector

- Compare the velocities of different planets

**6. Circular motion **

- Explain the App interface

- Demonstrate uniform circular motion

- Define uniform circular motion

- Show how position, velocity, acceleration and force vary with time

- Define angular velocity and angular acceleration

- Solve numericals based on angular velocity and angular acceleration

- Demonstrate the motion of a Carousel

- Change different parameters shown in the Carousel App

- Define centripetal force

- Solve a numerical based on centripetal force

**7. Sound waves **

- About the App interface

- Simulate the formation of a standing wave

- Define and explain a node and an antinode

- Simulate harmonics of a standing wave

- Show different vibrational modes of standing waves

- About constructive interference of sound waves

- About destructive interference of sound waves

- Define wavelength and frequency

- Calculate the wavelength of a standing wave

- Calculate the frequency of a standing wave

** 8. Reflection and Refraction**

- About App interfaces

- Simulate reflection and refraction of light ray

- Define the Snell’s law

- Change the medium and angle of incidence to verify Snell's law

- Verify the formation of total internal reflection

- Verify the formation of critical angle

- Calculate the critical angle and tabulate the results

- About reflection and refraction of waves by Huygens’ principle

- Show the formation of secondary wavefront

- Change in the speed and wavelength with respect to the medium

## Intermediate Level

** 1. Convex Lenses**

- About App interface

- Image formation using a convex lens

- Change the focal length in the App

- Change the object distance and object height in the App

- Determine the characteristics of the image formed

- Determine the position of the image formed

- About the ray diagram

- Calculate the magnification of refracting astronomical telescope

- Calculate the length of telescope tube

** 2. Interference and Diffraction**

- About App interface

- Change the wavelength and width of slit

- Interpret the interference pattern

- About constructive and destructive interference

- Verify the relation between wavelength and relative intensity

- Tabulate the values of relative intensity, maxima and minima

- Calculate angle for a given maxima using the condition for maxima

- Interpret diffraction intensity profile

- Verify the relation between wavelength and angle in diffraction

** 3. Magnetism and Electromagnetism**

- Draw magnetic field lines for a bar magnet

- Verify Right hand thumb rule

- Verify Fleming’s Left hand rule

- Verify Fleming’s Right hand rule

- Specify the direction of the induced current

- Define a generator

- Simulate the working of a generator

- About commutator

- Show changes in the voltage v/s time graph in the DC generator

- Show the voltage v/s time graph in the AC generator

** 4. Ohm's Law and its Applications**

- About App interfaces

- Change the voltage and observe the change in the current

- Verify Ohm’s law

- Draw a graph to find the relation between voltage and current

- Solve a numerical based on Ohm’s law

- Convert ampere to milli-ampere

- Make a tabular column to show the values of voltage and current

- Solve a numerical based on series and parallel combination

- Show how to connect ammeter and voltmeter in the circuit

- Calculate the value of current in the circuit

**5. Wheatstone's Bridge and Potentiometer**

- About App interfaces

- Define a galvanometer

- Illustrate circuit connections of wheatstone’s bridge

- Change the resistance of the comparable resistor

- Calculate the value of unknown resistance in a wheatstone’s bridge

- Illustrate circuit connections of potentiometer

- Tabulate the values of resistance, voltage and length

- Study the graph of voltage v/s length

- Calculate the value of voltage using Ohm’s law

- Solve a numerical based on potentiometer